<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
            <div class="title" border-topbottom>当前城市</div>
            <div class="button-list">
                <div class="button-wrapper">
                    <div class="button">{{this.currentCity}}</div>
                </div>
            </div>
        </div>
        <div class="area">
            <div class="title border-topbottom">热门城市</div>
            <div class="button-list">
                <div class="button-wrapper"
                v-for="item of hot"
                :key="item.id"
                @click="handleCityClick(item.name)"
                >
                    <div class="button">{{item.name}}</div>
                </div>
            </div>
        </div>
        <div 
        class="area" 
        v-for="(item, key) of cities" 
        :key="key"
        :ref="key"
        >
            <div class="title border-topbottom">{{key}}</div>
            <div class="item-list">
                <div class="item border-bottom"
                v-for="innerItem of item"
                :key="innerItem.id"
                @click="handleCityClick(innerItem.name)"
                >
                {{innerItem.name}}
                </div>
            </div>
        </div>
        </div>
    </div>
</template>

<script>
import BetterScroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
    name: 'CityList',
    props: {
        hot: Array,
        cities: Object,
        letter:String
    },
    computed: {
        ...mapState({
            currentCity:'city'
        })
    },
    methods:{
        handleCityClick(city){
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
    },
    watch: {
        letter(){
            if (this.letter){
                const element = this.$refs[this.letter][0]
                this.scroll.scrollToElement(element)
            }
        }
    },
    mounted(){
        this.scroll = new BetterScroll(this.$refs.wrapper, {
            click: true
        })
    }
}
</script>

<style lang="stylus" scoped>
    @import '~styles/varibles.styl'
    .border-topbottom
        &:before
            border-color: #ccc
        &:after
            border-color: #ccc
    .border-bottom
        &:before
            border-color: #ccc
    .list
        overflow: hidden
        position: absolute
        top: 1.58rem
        left: 0
        right: 0
        bottom: 0
        .title
            line-height: .54rem
            background: #eee
            padding-left: .2rem
            color: #666
            font-size: .26rem
        .button-list
            overflow: hidden
            padding: .1rem .6rem .1rem .1rem
            .button-wrapper
                float: left
                width:33.33%
                .button
                    margin: .1rem
                    padding: .1rem 0
                    text-align: center
                    border: .02rem solid #ccc
                    border-radius: .06rem
        .item-list
            .item
                line-height: .76rem
                padding-left: .2rem
</style>